WR to YZ cam timing
Posted November 26, 2008 - 10:46 AM
Posted November 26, 2008 - 10:49 PM
Posted November 27, 2008 - 11:23 PM
Yep, you are correct. With the 450's came auto-decomp.
My question is what year did we lose the ability to move the stock cam 1 tooth. I believe it was with the 450s.
Posted November 28, 2008 - 09:41 AM
Posted December 22, 2008 - 04:03 PM
I know I don't have the stock exhaust cam in my 2000 WR400 because it has autodecomp (and the original is in a box). How can I tell that it's a YZ cam versus something else, and if it's a YZ cam do I still go with 12 teeth between cams or do I go with the original 13? I guess more specifically, how many teeth should be between the cams if you have a YZ exhaust cam?
Posted December 22, 2008 - 06:08 PM
So, I guess I just go with stock timing? It looked somewhat "weird" when I took it out. I should have counted the links even though I have the book. :sigh:
Posted December 22, 2008 - 07:48 PM
When I put the yz cam in my '98 I eye'd up the cam lobes from the '98 to the '03 and transfered the timing marks with a paint stick. I adjusted one tooth for yz timing and everything worked fine. You could probably do the same without the adjustment for yz timing.
Posted December 22, 2008 - 10:21 PM
So currently it's not starting, but that could be because it's super cold out there, even with the kerosene heater. What I ended up doing was I had the intake cam as it's supposed to be with the dot on the line from the head, and the exhaust cam I actually had rotated clockwise a bit so the lobes lined up correctly. Sound about right? In theory even if it was off by a tooth it should run albeit with reduced power.
The other nagging question is I never found a really great timing mark, even when taking it apart. The picture in the manual, and other marks I've seen on other bikes, is a very distinct vertical line. But on my WR, it's shorter, and really looks like the 'I' in "HI". This is right before an arrow, so what you get is "HI <-". I aligned on the 'I'. Is that correct?
Back to the garage to kick the thing some more. Wish me luck and let me know if you see something I did wrong.
Posted December 24, 2008 - 04:04 PM
I think that the problem is my exhaust cam is one tooth off, in the "will not run even though it looks correct" direction mentioned in that guide.
I'll give it another shot after the holidays.